Plate-holder and operating means.



No. 674,476. Patented may 2|, Ism.

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PLATE HOLDER AND OPERATING MEANS.

(Application led July 17, 1897.) (No Model.) 3 Sheets-Sheet I.

JMP@ of L sZa' for @Zamjv 57m/Ue of clam/a .mu

Y, Y EL Patented May 2l, 190|. W. SCOTT.

(Application led July 17, 1897.) 3 sheets-sheet 2.

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PLATE HOLDER'AND UPRATING MEANS.

(No Model.)

No. 674,476. Patented may 2|, 901.

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PLATE HOLDER AND OPERATING WIEANS.

3 Sheets-Sheet 3.

(Applicat'ipn led July 17 189.7.) (No Model.) i

@W1/Leo o UNITED STATES WALTER SCOTT, OF PLAINFIELD, NEW JERSEY.

PLATE-HOLDER AND OPERATING MEANS.

SPECIFICATION forming part of Letters Patent No. 674,476, dated May 21, 1901.

Serial No. 644,996. (No model.)

To a/ZZ whom it 1v1/ty concern:

Be it known that I, WALTER SCOTT, a citizen of the United States, and a resident of Plainfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Plate-Holders and Operating Means, of which the following is a specification.

This invention relates to means for attaching or clamping plates to plate-cylinders in printing-machines, the primary object being to adj ustably attach the plates in order that they may be moved upon the cylinder to bring them into proper register.

To this and other ends the invention includes combinations of devices hereinafter described, and more particularly pointed out in the claims concluding this specification.

The preferred form of the invention is shown in the accompanying drawings, forming part of this specification, in which- Figure lis an end view of a plate-cylinder, showing the invention thereon. Fig. 2 is a side elevation of one end of a plate-cylinder for a four-form-wide press, showing the invention thereon. Fig. 3 is a view of part of the cylinder looking in the direction of the arrow 3 in Fig. l. Fig. 4 is a partial longitudinal section of the cylinder on the radial plane through plate-holders,operatin g means, and slot therefor. Fig. 5 is a detail View in section, showing also a modification of a bar or ring shown in Fig. 2 for holding one end of the plates. Fig. 6 is a plan view of my new means for holdingv and adjusting the plates with regard to motion or movement circumferentially of the cylinder. Fig. 7 is an end View; and Fig. Sis a side view, partly in section, of the devices shown in Fig. 6.

The reference-letter P indicates a platecylinder, which I provide with a series of slots a,`extending longitudinally thereof, preferably two slots for each plate in a circumferential row on the cylinder. These slots ct extend from one end of the cylinder at least to a point beyond the first circumferential row of plates sufficient to allow ofthe use of clamps for one edge of the second row of plates on the cylinder. The above has reference to the four-form-wide Web-presses. The cross-section of the slot a, is in the preferred form of the invention the same as that marked in Fig. 1 with the words Shape of slot for clamp D, while in the tWo-forxn-wide press the crosssection of the slot a is in the preferred form the same as that marked in Fig. 1 with the words Shape of slot for clamp C, reference being had in each case to the shaded parts. The ends of the slots are closed by the bearl ing band or plate l), which is suitably secured to the end of the cylinder P. Each slot is shown as provided with two clamps C C',whose cross-section is in the case shown indicated in Fig. l by the shaded portion marked with the words Shape of clamp C, and with one -clamp D, whose cross-section is in the case shown indicatedin Fig. l by the shaded portion marked with the words Shape of clamp D. The ends of the plates p are provided with reduced .portions or the entire end is reduced, as by beveling oh', and the clamps O C are provided With correspondingly-shaped underout portions c for engagement with said reduced ends of the plates. The clamps D are shown with undercut portions d for the like purpose. The clamps C O are provided with internally-screw-threaded holes, which respectively engage with the screws e f. The screws e fare placed in the slots a, and the screw e is provided with a collar g on its smooth shaft. The screw fis hollow and fits over the shaft of the screw e and abuts against the collar g, as shown in Fig. 4. The screw f is provided with a collar h, which lies in a counterbore of the bearing in which the shaft of the screw is journaled in the bearing o. The shaft of the screw c extends beyond the end of the screw fand hasthecapc'forced r secured thereon. The screw fis thus held against end wise displacement by the collar g and the bearer b. The ends of the screws f and the caps z' are suitably shaped to receive wrenches or the like. The clamp D is providedA with a screw-threaded hole, which engages with the screw 7c, placed in the slot a, to abut at one end against the end of the slot and provided with a collar l, which abuts against the bottom of a counterbore of the hole in the bearer b, through which the shaft of the screw passes. The end of the shaft of the screw lo is shaped to receive a -wrench or the like. The clamps O C are provided with IOO side fianges m, which fit the groo'ves p/L,Which open into the slots a, While the clamps D are provided with side fianges o, which fit the grooves n px. The said clam ps are thus held in while freely movable along the slots a. For that end of the row of plates p which is farthest from the end of the plate-cylinder P, I sometimes provide a circumferentiallyextending bar or ring 3, which is undercut, as by a bevel 4, to receive the ends of the plates. In order to provide for and to hold a cushion between the ends of the plates p' and the bar or ring 3, I sometimes cut away the metal of the cylinder, as at 5, and place a strip of paper 6 or the like over the edge of the plate, so as to place the plate in register, the strip extending into the cavity 5. Instead of extending in the direction of the beveled surface of the plates the cavity may have the shape shown at 7, by which the paper is given a bend, and is so less liable to work out. The paper also assists in giving register to the plates. The beveled edges of the plates p engage or pass under overhanging edges of circumfereutially-extending bars m, secured to or formed in one with the cylinder I), thus preventing the screws e and f from moving inwardly of the cylinder, while collar 7i prevents outward motion thereof when the plates p are under the bar In order to give a better register to the matter printed from the plates, I provide means for holding the sides of the plates in an adj ustable manner and show the preferred means in Figs. 6, 7, and 8. I provide clamps r, which are somewhat similar to the clamps D, and place them in grooves q, which are of a cross-section suitable for the purpose of holding the clamps r, while allowing the clamps to move along in them. Thus the grooves q may be provided with side channels s for the reception of the anges t on the clamps fr. At one place the upper walls or tops of the channels are entirely removed to facilitate the putting of the clamps into place. The clamps are undercut to fit the edges of the plates and are moved along the grooves q by means of the screws u, which engage screw-threaded holes in the clamps r and bear against the end walls of the grooves, as shown. The screws u may be conveniently moved, as by means of the capstan-heads w. As many of these side clamps r may be used as are desired.

It is understood that each end of the platecylinder may have the same described outfit for moving and clamping the plates.

I remark that by my new invention each plate on the cylinder is independently held in place and that by fitting the cylinder with clamps in place of the ring or bar 3 each plate may be moved or adjusted in two directions, longitudinally and circumferentially, on the cylinder P by the c lamps C C D r. In the form of the invention shown in the drawings each of the outer plates p is independently adjustable in the directions named,while each plate p is independently adjustable circumferentially only, except by the use of the layers of paper under the ring 3.

Many changes in details and parts of combinations may be made without departing from the spirit of this invention. I therefore do not limit myself to the form thereof shown in the drawings and hereinbefore described.

`What I claim is- 1. In a printing-machine, a plate-cylinder 'having a continuous circumferential groove over which the edge of a plate hangs, substantiall y as described.

2. In a printing-machine, a plate-cylinder provided with an overhanging circumferentially-extending plate-holder for the edge of a plate, said holder coacting with the plate at the upper side thereof only, and a continuous circumferential groove under said overhanging holder and under the edge of a plate held thereby, substantially as described.

3. In a printing-machine, a plate-cylinder provided with an overhanging circumferentially-extending plate-holderfor the edge of a plate, said holder coacting with said plate at the upper side thereof only, and a continuous circumferential groove under said overhanging holder and under the edge of a plate held thereby, said groove having parallel walls, substantially as described.

4. In a printing-machine, the combination of a plate-cylinder, a plate thereon provided with reduced ends, a slot extending longitudinally of the cylinder, a pair of undercut clamps held in and movable along the slot, a pair of screws having the same axis of rotation one for and engaging each clamp and both extending to the end of the cylinder, and means for holding the sides of the plate, substantially as described.

5. In a printing-machine, the combination of a plate-cylinder, two plates thereon in the same longitudinal line thereof, and provided with reduced ends, a fixed circumferential bar or ring provided with an overhang for engagement with the end of the inner plate a longitudinal slot in said cylinder, three undercut clamps held in and movable along the slot for engagement with the plates, a screw in said slot for each clamp engaging therewith and extending to the end of the cylinder, substantially as described.

6. In a printing-machine, the combination of an outer and an inner plate, a plate-cylinder on which said plates are disposed in the same longitudinal line, a longitudinal slot in said cylinder under said plates, clamps in said slot for holding said plates, and rotatory screws in said slot for and engaging with threaded holes therein, said clamps for moving them independently toadj ust said plates, substantially as described.

7. In a printing-machine, the combination of a plate-cylinder, an outer and an inner plate on said cylinder in the same longitudinal line, a circumferential bar or ring on said cylinder provided with an overhanging holder IOO IIO

for engagement with one of said plates, three undercut clam ps held in and movable along a longitudinal slot in said cylinder under the plates, two screws one outside the other and placed in said slot for operating two of said clamps and reaching to the end of the cylinder, and a third screw in said slot for operating the third of said clamps, substantially as described.

S. In a printing-press, the combination of independently-rotatable screws arranged one with its shank passing through the other screw, with two independently-movable clamps for the plates engaging one with one screw and the other clamp with the other screw, substantial] y as described.

9. In a printing-press, the combination of a longitudinally-slotted plate-cylinder, two independent clamps for the plates guided in said slot, and two independently-rotatable screws arranged one with its shank passing through the other screw and its shank and both shanks extending beyond the cylinder and said screws engaging one with one clamp and the other screw with and operating the other clamp, substantially as described.

l0. In a printing-machine, a plate-cylinder, two or more circumferential rows of plates thereon, and clamping mechanism extending to and operable at one end of the cylinder for adjusting or movingsaid plates independently on said cylinder longitudinally thereof, in combination, substantially as described.

1l. In a printing-machine, a plate-cylinder, two or more rows of plates thereon extending circumferentially thereof, and clamping mechanisms for adjusting or moving said plates independently on said cylinder longitudinally and circumferentially thereof the mechanism for adjusting longitudinally eX- tending to and operable at the end of the cylinder, in combination, substantially as described.

12. In a printing-press, the combination of a plate-cylinder, a plurality of circumferential rows of plates thereon, means for moving individual plates circumferentially of the cylinder independently and clamping them, and means for adjusting individual plates longitudinally of the cylinder independently and clamping them, the last-named means extending to and operated at the end of the cylinder, substantially as described.

Signed at New York, in the county of New York and State of New York, this 25th day of June, A. D. 1897.

WALTER SCOTT.

Witnesses: RICHARD W. BARKLEY, GUS. C. HENNING. 

